US3375285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic hydrogenation of polycyclic aromatic quinones
Assignee: Marathon Oil Co
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Filing: 1963-12-12
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Granted: 1968-03-26
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Expires: 1983-12-12
Abstract
No abstract record available.
Inventors
- 👤 Perry A Argabright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:36
CPC Classifications
C; C07; C07C; C07C61/00; C07C61/16; C07C61/40; C07C37/00; C07C37/06; C07C37/07; C07C39/00; C07C41/00; C07C41/01; C07C41/18; C07C41/26; C07C43/00; C07C43/02; C07C43/20; C07C43/23; C07C46/00; C07C46/02; C07C46/06; C07C50/00; C07C50/26; C07C50/28; C07C50/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
THE PROCESS COMPRISING REACTIG WITH HYDROGEN A COMPOUND HAVING AT LEAST ONE TERMINAL 1,4-QUINOID RING FUSED TO AN AROMATIC RING IN THE PRESENCE OF CATALYTIC AMOUNTS OF COPPER CHROMITE AND AT TEMPERATURES AND HYDROGEN PRESSURES EFFECTIVE TO REDUCE AT LEAST ONE SAID QUINOID RING TO PRODUCE A NONKETO COMPOUND SELECTED FROM THE GROUP CONSISTING OF MONO- AND POLYHYDRIC ALCOHOLS, WHEREIN THE TEMPERATURE IF FROM ABOUT 125*C. TO ABOUT 200*C., THE HYDROGEN PRESSURE IS IN EXCESS OF ABOUT 500 P.S.I.G. AND THE REACTION IS CARRIED OUT FOR A PERIOD OF TIME RANGING FROM ABOUT 1 TO ABOUT 8 HOURS.
Claim 2
Dependent Claim
98 words
THE PROCESS COMPRISING REACTIG WITH HYDROGEN A COMPOUND HAVING AT LEAST ONE TERMINAL 1,4-QUINOID RING FUSED TO AN AROMATIC RING IN THE PRESENCE OF CATALYTIC AMOUNTS OF COPPER CHROMITE AND AT TEMPERATURES AND HYDROGEN PRESSURES EFFECTIVE TO REDUCE AT LEAST ONE SAID QUINOID RING TO PRODUCE A NONKETO COMPOUND SELECTED FROM THE GROUP CONSISTING OF MONO- AND POLYHYDRIC ALCOHOLS, WHEREIN THE TEMPERATURE IF FROM ABOUT 125*C. TO ABOUT 200*C., THE HYDROGEN PRESSURE IS IN EXCESS OF ABOUT 500 P.S.I.G. AND THE REACTION IS CARRIED OUT FOR A PERIOD OF TIME RANGING FROM ABOUT 1 TO ABOUT 8 HOURS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-26 | 1971-09-25 | 1972-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-26 | 1975-09-25 | 1976-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-26 | 1979-09-25 | 1980-03-26 | $7700.00 | Window Closed / Lapsed |